Basic Data
| Maker: | Gilbert |
| Date (year): | |
| Description: | |
| Signature: | |
| Collection: | Private Collection |
| Accession #: | B.19 |
| Style: | maritime |
| Objective type: | doublet - crown forward |
| Notes: | |
Objective Data
| Lens 1 |
Lens 2 |
Complete |
| CA curvature (diopters): |
8.576 ± 0.007 |
|
|
| CB curvature (diopters): |
|
2.430 ± 0.007 |
|
| PD lens power (diopters): |
|
|
2.01 ± 0.004 |
| fD focal length (mm): |
|
|
497 ± 1 |
| t thickness (mm): |
|
|
7.87 |
| d free aperture (mm): |
|
|
33 |
| nD refractive index: |
|
|
|
| ν Abbe No.: |
|
|
|
Eyepiece Data
| No. of eyepiece elements: | 0 |
(elements of one eyepiece) |
| Complete |
| fD focal length (mm): |
37.79 |
| d diameter (mm): |
|
| s spacing (mm): |
|
| CA curvature (diopters): |
|
| CB curvature (diopters): |
|
| M magnification: |
13.1 |
| FOV field of view (degrees): |
1.92 |
Objective Color Curve Data [(Δf/f)x10-3]
| # |
Wavelength (nm) |
Paraxial |
70% Zone |
Whole Lens |
| 1 |
482 |
|
2.2 ± 0.4 |
|
| 2 |
575 |
|
0 |
|
| 3 |
652 |
|
-0.7 ± 0.3 |
|
Attached Files (click to enlarge)
This entry, number 101, was created on 2006-08-30 12:55:30 and last modified on 2006-09-14 07:21:24.
